Air conditioner



FIG. 1 is a perspective view of an air conditioner showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof where the right side view is a mirror image;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the figures are directed to environment and illustrate unclaimed features. The broken lines form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 